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README.md

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+---
+license: cc-by-4.0
+language:
+  - en
+pretty_name: SmartStake MLB Player Prop Odds and Results (2026)
+tags:
+  - sports-betting
+  - sports-analytics
+  - mlb
+  - baseball
+  - odds
+  - player-props
+size_categories:
+  - 100M<n<1B
+task_categories:
+  - time-series-forecasting
+  - tabular-classification
+configs:
+  - config_name: default
+    data_files:
+      - split: train
+        path: "mon=*/*.parquet"
+---
+
+# SmartStake MLB Player Prop Odds and Results (2026)
+
+Minute-by-minute MLB player prop odds from ~75 sportsbooks and exchanges over the
+2026 season, with the graded outcome of each prop attached. Every row is one
+book's price for one selection at one minute. This is the raw material behind
+the study ["Sharpest Sportsbooks for MLB Player Props"](https://smartstake.app/learn/sharpest-sportsbooks-mlb-player-props).
+
+## Coverage
+
+- **Odds:** late March 2026 through early July 2026.
+- **Graded outcomes:** March through June (games that had settled at export time).
+  July rows carry odds but `result` and `won` are null.
+- **Markets:** total bases, hits, RBIs, home runs, strikeouts, batting walks.
+- **Books:** ~75 sportsbooks, exchanges, and prediction markets (Kalshi, ProphetX,
+  Novig, Pinnacle, DraftKings, FanDuel, Fanatics, and more).
+
+## Schema
+
+| column | type | description |
+|---|---|---|
+| `game_id` | string | Stable game identity. Fragmented source keys were collapsed to one id per game (see below). |
+| `start_time` | timestamp | Scheduled first pitch (UTC). Subtract `ts` for time-to-first-pitch. |
+| `player` | string | Player name. |
+| `market` | string | Prop market (e.g. `player total bases`). |
+| `line` | double | The over/under number for this selection. |
+| `side` | string | `over` or `under`. |
+| `book` | string | Sportsbook / exchange. |
+| `ts` | timestamp | Minute the quote was live (UTC). One row per changed minute. |
+| `odds` | double | Decimal odds. |
+| `result` | double | The player's actual stat for that market. Null if the game had not settled or the player was inactive. |
+| `won` | boolean | Whether this side won. Null for a push (`result == line`) or an ungraded/void selection. |
+
+## The match-key de-drift
+
+Games in the raw feed sometimes fragment across several identity keys when a
+scheduled start time shifts. Those fragments were mapped to a single `game_id`
+via a crosswalk, and duplicate `(game_id, player, market, line, side, book, minute)`
+rows were collapsed to the latest quote. So one game counts as one game, not
+several. Grade and group on `game_id`.
+
+## Loading
+
+```python
+from datasets import load_dataset
+ds = load_dataset("SmartStake/mlb-player-props", split="train")
+```
+
+```python
+import pandas as pd
+df = pd.read_parquet("hf://datasets/SmartStake/mlb-player-props/mon=2026-05")
+```
+
+```sql
+-- DuckDB, straight from the hub
+SELECT book, count(*) FROM 'hf://datasets/SmartStake/mlb-player-props/**/*.parquet' GROUP BY 1;
+```
+
+## Provenance, license, and responsible use
+
+Odds were collected from public sportsbook and exchange feeds; outcomes are from
+official box scores. Released under CC BY 4.0 for research and educational use.
+This dataset is informational and historical: past prices and results do not
+predict future outcomes, and betting carries risk of loss. Not affiliated with
+any sportsbook. 21+.
+
+## Citation
+
+> SmartStake (2026). SmartStake MLB Player Prop Odds and Results (2026). Hugging Face.

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